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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        class Person {
        // 构造函数使用 constructor 关键字作为名称
        constructor(name, age) {
            console.log("-----------调用 Person 构造-------------")
            this.name = name;
            this.age = age;
        }
        // 定义成员方法
        show() {
            console.log("我是： " + this.name + "，我的年龄是： " + this.age);
        }
        }
        // 让 Student 继承 Person
        class Student extends Person {
            constructor(name, age, hobby) {
            console.log("-----------调用 Student 构造-------------")
            // 报错： ReferenceError: Must call super constructor ...
            // this.hobby = hobby; // 报错代码
            super(name, age);
            this.hobby = hobby;
            }
            show() {
            super.show();
            console.log("我的爱好是： " + this.hobby);
            }
        }
        let stu = new Student("张三", 18, "打球");
        stu.show();
    </script>
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